<div class="meta-collapse-inner off" ng-class="{'off':off}" ng-transclude></div>
<span class='meta-collapse-switch' ng-class="{'off':off,'on':!off, 'closed': closed}" ng-click='switch()'>
    <i class='glyphicon' ng-class="{'glyphicon-menu-up':!off,'glyphicon-menu-down':off}"></i>{{(off?'展开':'收起')}}
</span>
